.card-stats .bi{
  width: 50px;
  height: 50px;
  display: block;
  background-color: #e4e4e4;
  color: #fff;
  border-radius: 50%;
  line-height: 50px;
  text-align: center;
  font-size: 24px;
  margin-top: 4px;
}